cc::TransformTree
Blink2861 Nov 2025

cc::TransformTree

source provides a highly detailed technical overview of the Transform Property Tree within the Chromium compositor, which is a core component of the RenderingNG architecture responsible for all coordinate transformations and geometric calculations. This structure uses TransformNode entries to represent individual coordinate spaces, enabling the efficient computation and caching of transforms such as to_parent (local transform to the parent) and to_screen (global transform to the root viewport). Critically, the TransformTree handles complex visual features like CSS transforms, scrolling (treating offsets as translation matrices), 3D contexts and flattening, and pixel snapping to ensure visual precision, all while propagating animation status and damage tracking to minimize recalculations and allow off-main-thread updates.


Episoder(398)

Blink Main-Thread Scrolling – DOM, Layout, and Lifecycle

Blink Main-Thread Scrolling – DOM, Layout, and Lifecycle

The source provides an extensive technical overview of how the Blink rendering engine handles scrolling, particularly focusing on the main-thread scrolling lifecycle. It explains that while modern bro...

10 Nov 202545min

Architecture of Scrolling in Chrome (Blink vs. CC Overview)

Architecture of Scrolling in Chrome (Blink vs. CC Overview)

The source provides an extensive overview of the Chrome browser's scrolling architecture, detailing the division of labor between the Blink rendering engine (main thread) and the Chromium Compositor (...

10 Nov 202526min

[ext] Web View Transitions: Technical Deep Dive

[ext] Web View Transitions: Technical Deep Dive

The source provides an exhaustive technical and historical overview of the Web View Transition API, a modern set of web platform features designed to enable fluid, animated transitions between user in...

9 Nov 20251h 16min

Chromium Input Handling Deep Dive: Compositor and Proxy

Chromium Input Handling Deep Dive: Compositor and Proxy

The sources provide an extensive examination of Chromium’s input handling pipeline, focusing on the roles of the InputHandler and InputHandlerProxy within the renderer's dedicated compositor thread. T...

8 Nov 202540min

Web View Transitions: Technical Deep Dive

Web View Transitions: Technical Deep Dive

The second source introduces the View Transition API, a modern web platform feature that allows developers to create smooth, animated transitions between different UI states or entire pages by automat...

8 Nov 202547min

Chrome Compositor: Raster-Inducing Scrolling Explained

Chrome Compositor: Raster-Inducing Scrolling Explained

The source provides an extensive technical explanation of raster-inducing scrolling within the Chrome browser's rendering pipeline, focusing on the sophisticated architecture of the Chrome Compositor ...

8 Nov 202542min

Chromium ContentBrowserTest Architecture and Practice

Chromium ContentBrowserTest Architecture and Practice

The source provides an extensive overview of Chromium's ContentBrowserTest system, which functions as an integration test harness designed for the content layer of the browser. These tests operate by ...

6 Nov 202544min

Blink Compositor Promotion of CSS Animations

Blink Compositor Promotion of CSS Animations

The technical sources provide an extensive analysis of how the Blink rendering engine (used in Chromium/Chrome) determines whether a CSS animation can be executed on the compositor thread instead of t...

6 Nov 202536min

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